[go: up one dir, main page]

WO2010045912A1 - Empilement de piles à combustible - Google Patents

Empilement de piles à combustible Download PDF

Info

Publication number
WO2010045912A1
WO2010045912A1 PCT/DE2009/001362 DE2009001362W WO2010045912A1 WO 2010045912 A1 WO2010045912 A1 WO 2010045912A1 DE 2009001362 W DE2009001362 W DE 2009001362W WO 2010045912 A1 WO2010045912 A1 WO 2010045912A1
Authority
WO
WIPO (PCT)
Prior art keywords
bipolar plate
fuel cell
cell stack
mea
contact points
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DE2009/001362
Other languages
German (de)
English (en)
Inventor
Andreas Reinert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Staxera GmbH
Original Assignee
Staxera GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Staxera GmbH filed Critical Staxera GmbH
Priority to JP2011531345A priority Critical patent/JP5372161B2/ja
Priority to US13/062,884 priority patent/US8790844B2/en
Publication of WO2010045912A1 publication Critical patent/WO2010045912A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0247—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form
    • H01M8/0254—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form corrugated or undulated
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0204—Non-porous and characterised by the material
    • H01M8/0206—Metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0204—Non-porous and characterised by the material
    • H01M8/0223—Composites
    • H01M8/0228—Composites in the form of layered or coated products
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2465—Details of groupings of fuel cells
    • H01M8/2483—Details of groupings of fuel cells characterised by internal manifolds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49936—Surface interlocking

Definitions

  • the invention relates to a fuel cell stack having a plurality of membrane-electrode assemblies (MEAs) and a plurality of bipolar plates, wherein at least one surface of a first bipolar plate wavy, meandering or zigzag-shaped and extremes of the surface of the bipolar plate contact a first surface of an MEA at contact points.
  • MEAs membrane-electrode assemblies
  • the invention further relates to a method for producing a fuel cell stack according to the invention.
  • the invention further relates to a bipolar plate having a wavy, meandering or zigzag upper surface, a lower surface, a left wall and a right wall.
  • MEA membrane electrode assembly
  • anode layer is supplied with fuel gas, for example hydrogen
  • oxidizing gas for example air
  • oxygen ions O 2 in and at the anode layer combine with hydrogen ions H + to form water molecules H 2 O. Energy released can be utilized by switching a load between the anode and the cathode.
  • SOFC solid oxide fuel cell
  • a single fuel cell provides only a low electrical voltage (typically between 0.1V and 1V)
  • the cathode layer of a fuel cell is connected to the anode layer of the adjacent fuel cell via a bipolar plate.
  • the bipolar plate separates a flow region of the fuel gas from a flow region of the oxidation gas.
  • Bipolar plates which have a meandering, wave-shaped (corrugated-plate-like) or zigzag-shaped surface, have proven particularly suitable. Bipolar plates of this type bind to the adjacent fuel cell via extreme points (summit points) of their surface. The lying between the extreme points valleys form channels for guiding fuel gas or oxidizing gas.
  • the fuel cell stack according to the invention builds on the prior art in that at least a portion of the contact points mating contact points on one of the first surface of the MEA opposite second surface of the MEA are associated, which are contacted by a surface of a second bipolar plate, wherein the contact points and the associated Counter contact points lie one above the other in the stacking direction. If a force is exerted on the MEA via one of the contact points, a counter force can be exerted on the MEA via the corresponding mating contact point, whereby stresses within the MEA or deformations of the MEA that would occur in the absence of such a counterforce are avoided. The power flow within the fuel cell stack can thus be optimized. Also, a greater rigidity of the fuel cell stack may result in the stacking direction.
  • all contact points are assigned mating contact points. This means that there are no contact points between extreme points of the surface of the bipolar plate and the first surface of the MEA, to which no mating contact points are assigned. This will be particularly effective Way undesirable stresses and deformations within the fuel cell stack avoided.
  • the mating contact points can be contacted by the surface of the second bipolar plate via a metal foam, for example via a nickel foam.
  • a metal foam for example via a nickel foam.
  • counterforces can be exerted on the mating contact points on the metal foam. The prerequisite is that the foam is sufficiently rigid.
  • the metal foam contacts the second surface of the MEA only in the mating contact points. This avoids that the metal foam exerts forces on those areas of the second surface of the MEA to which no forces are transmitted directly from the first bipolar plate.
  • the first bipolar plate and the second bipolar plate may have the same shape.
  • the first and the second bipolar plate can be identical. The manufacture, maintenance and repair of the fuel cell stack can be facilitated thereby.
  • first bipolar plate and the second bipolar plate can be rotated relative to one another by 180 degrees about an axis parallel to the stacking direction. This results in a simple and clear structure of the fuel cell stack.
  • first bipolar plate and the second bipolar plate may be rotated 180 degrees relative to each other about an axis perpendicular to the stacking direction.
  • first bipolar plate and the second bipolar plate may be rotated 90 degrees from each other about an axis parallel to the stacking direction.
  • first bipolar plate and the second bipolar plate each have a plurality of parallel webs or grooves (channels) for guiding the gas, a particularly high stability of the fuel cell stack can be achieved by such a crossed arrangement.
  • the first bipolar plate and the second bipolar plate are designed differently.
  • the surface of the first bipolar plate may be a surface of a corrugated sheet.
  • the first bipolar plate is essentially realized by a corrugated metal sheet.
  • the inventive method is used to produce a fuel cell stack according to the invention, in which the first bipolar plate and the second bipolar plate are identical. It is characterized in that the second bipolar plate is rotated in a rotated by 90 degrees or 180 degrees relative to the first bipolar plate position, and that the bipolar plates are stacked in the relative position thus achieved.
  • the method comprises a step of joining the fuel cell stack, in which a surface pressure is exerted on the fuel cell stack.
  • the surface pressure is effected such that extreme points of the surface of the first bipolar plate, which contact the MEA, are deformed in a planar manner.
  • the surface pressure on the MEA no force.
  • a largely planar contact between the first bipolar plate and the MEA at the contact points can be achieved in order to ensure good current-carrying properties.
  • the height of the fuel cell stack can be reduced.
  • the entire surface of the first bipolar plate is prevented from contacting the MEA.
  • the surface pressure can be exerted on the fuel cell stack in such a way that the extreme points of the surface of the second bipolar plate which contact the MEA are deformed in a planar manner. Again, no force is transferred to locations of the surface of the second bipolar plate with respect to the MEA opposite contact point by the surface pressure on the MEA. It thus also results in a largely flat contact between the second bipolar plate and the MEA at the mating contact points.
  • the surface pressure thus results in a force transmission to the extreme points of the bipolar plate or the bipolar plates via the MEA. It is particularly advantageous if the contact points or the mating contact points are contacted via a metal foam, in particular via a nickel foam. Such a foam is relatively resilient to the surface pressure and provides a good electrical contact.
  • the bipolar plate according to the invention is characterized in that by a rotation of 180 degrees about an axis parallel to the stacking direction, the left wall and the right wall are substantially merged and at least two lower extremities of the lower surface under two corresponding upper extremities of the upper surface come lie.
  • This allows a particularly efficient production of a fuel cell stack.
  • two identical bipolar plates are produced.
  • the second bipolar plate is placed in a position rotated 180 degrees relative to the first bipolar plate.
  • at least two lower extreme points of the lower surface of the second bipolar plate come to rest over two corresponding upper extreme points of the upper surface of the first bipolar plate.
  • Particularly advantageous embodiments are those in which all lower extreme points of the lower surface come to rest under a rotation of 180 degrees about an axis parallel to the stacking direction in each case under corresponding upper extreme points of the upper surface.
  • Such a bipolar plate is realized in a particularly simple manner in that the entirety of the upper surface and the lower surface in the direction of an axis perpendicular to the stacking direction is periodic and their projection in this direction measures an odd multiple of half the period length.
  • FIG. 1 shows a schematic horizontal cross section through a gas flow field of a fuel cell stack
  • Figure 2 is a schematic vertical cross-section through (a) a deformed fuel cell stack according to a first embodiment; (b) a corresponding undeformed fuel cell stack;
  • FIG. 3 shows a schematic vertical cross section through a fuel cell stack according to a second embodiment;
  • FIG. 4 shows a schematic vertical cross section through a fuel cell stack according to a third embodiment
  • FIG. 5 shows a schematic vertical cross section through a fuel cell stack according to a fourth embodiment
  • FIG. 6 shows a schematic vertical cross section through a fuel cell stack according to a fifth embodiment
  • FIG. 7 shows a schematic vertical cross section through a fuel cell stack according to a sixth embodiment
  • FIG. 8 shows a schematic horizontal cross section through two successive bipolar plates of a fuel cell stack according to a seventh embodiment
  • FIG. 9 shows a flowchart of a method for producing a fuel cell stack.
  • FIG. 1 schematically shows a horizontal section through a fuel cell stack 10.
  • the horizontal plane is identical to the xy plane 2, 4 (stacking plane) and is perpendicular to the stacking direction (z-direction, perpendicular to the image plane).
  • the fuel cell stack 10 comprises a bipolar plate 24, which defines a plurality of channels 26, 28 for guiding oxidizing gas or fuel gas.
  • the channels 26, 28 are parallel to each other in the y-direction 4.
  • the oxidizing gas passages 26 serve to guide oxidizing gas, typically an oxygen-rich gas, and adjoin a cathode, not visible in the figure, of an MEA below the image plane.
  • the fuel gas channels 28 serve to guide fuel gas, for example hydrogen.
  • oxygen-rich oxidizing gas passes via an oxidizing gas inlet 12 into the oxidation gas channels 26 and flows (symbolized in the figure by arrows) along the cathode, where a portion of the gas is reduced.
  • Unused oxidant gas and the reaction product typically water exit the active area through an oxidizer gas outlet 16.
  • fuel gas eg, hydrogen
  • Unused fuel gas leaves the fuel gas channels 28 via a fuel gas outlet 18.
  • FIG. 2 shows a schematic vertical section through a partial region of the fuel cell stack 10 explained with reference to FIG. 1, firstly in a deformed state (a), which is caused by a "compression” of the stack along the vertical 6 (z-direction), and second, in an undeformed state (b).
  • the fuel cell stack 10 includes a plurality of substantially identical membrane-electrode assemblies MEAs and a plurality of substantially identical bipolar plates stacked alternately. On a first bipolar plate 24 is a MEA 30. On the MEA 30 is a second bipolar plate 36.
  • the first bipolar plate 24 and the second bipolar plate 36 defined by their wavy shape respectively together with the MEA fuel gas channels 28 and 26 Oxidationsgaskanäle extreme points of a surface 42 of Bipolar plate 24 contacts a first surface 32 (cathode surface) of the MEA 30 at pads 38. Extreme locations of a surface 44 of the second bipolar plate 36 contact a second surface 34 (anode surface) of the MEA 30 at pads 38. It can be seen from part (a) of the figure in that the MEA 30 is bent in a wave shape by the vertical forces applied simultaneously from below and above. The forces opposing the vertical forces and preventing collapse of the fuel cell stack are applied by the deformation of the MEA. However, MEAs typically typically consist at least in part of a relatively brittle material. If the forces exceed critical values, the material breaks. The MEA is thereby at least partially impaired in its functionality.
  • FIG. 3 shows a vertical cross section, analogous to FIG. 2, through a partial region of a fuel cell stack 10 according to a second embodiment.
  • the fuel cell stack 10 is periodically constructed both in the vertical direction 6 (z-direction) and in a horizontal direction 2 (x-direction). It includes in particular These are a first bipolar plate 24, an MEA 30 and a second bipolar plate 36.
  • the bipolar plates of the fuel cell stack, in particular the first bipolar plate 24 and the second bipolar plate 36 are identical. However, embodiments are also possible in which two successive bipolar plates are of different types.
  • the MEA 30 has a first surface 32 (cathode surface) and a second surface 34 (anode surface).
  • a corrugated surface 42 of the first bipolar plate 24 contacts the cathode surface 32 of the MEA 30 in contact pads 38.
  • a corrugated surface 44 of the second bipolar plate 36 contacts the anode surface 34 of the MEA at pads 40.
  • the wave profile of the second bipolar plate 36 is relative to the corrugated profile of FIG first bipolar plate 24 by half a period, that is, by a half wavelength, offset in the x direction.
  • the contact points 38 and the contact points 40 lie one above the other, that is to say project in the z-direction (stacking direction).
  • the contact points 40 between the second bipolar plate 36 and the MEA 30 thus form mating contact points to the contact points 38 between the first bipolar plate 24 and the MEA 30.
  • the surface 42 forms an upper surface of the first bipolar plate 24.
  • the bipolar plate 24 also has a lower surface 56.
  • the lower surface 56 and the upper surface 42 are geometrically similar in the example shown, but in principle they may also differ significantly from each other. In particular, the bottom surface need not be wavy, meandering or zigzagging.
  • a nickel foam 46 is arranged in the channels 28 between the second bipolar plate 36 and the second surface (anode surface) 34 of the MEA 30. This can increase the performance of the MEA and / or extend its life.
  • the fuel gas flows through the filled with the nickel foam 46 channels 28.
  • the surface 44 of the second bipolar plate 36 contacts the anode surface 34 in the mating contact points 40 not directly, but indirectly via the nickel foam 46th
  • the fourth embodiment sketched in FIG. 5 stands out from the second and third embodiments in particular in that the first bipolar plate 24 and the second bipolar plate 36 are identical and are not offset or rotated horizontally relative to one another.
  • the channels 28 are only partially filled with a nickel foam 46.
  • the nickel foam 46 has webs 48 which run parallel to the channels 26, 28 in the y-direction and connect to the anode surface 34 of the MEA 30 in mating contact points 40.
  • the mating contact points 40 also extend in the y direction.
  • Two adjacent webs 48 define, together with the anode surface 34, a cavity 50. Each web 48 contacts the MEA 30 in a mating contact point 40 of the upper surface 34.
  • Figure 6 illustrates an embodiment which is substantially analogous to the embodiment described with reference to Figure 3.
  • a z-axis 6 runs parallel to the stacking direction.
  • a y-axis (not shown) is perpendicular to the z-axis and to the image plane.
  • the y-axis is parallel to fuel gas channels 28 and oxidation gas channels 26.
  • An x-axis 2 is perpendicular to the z-axis 6 and lies in the image plane.
  • the fuel cell stack 10 is bounded laterally by a left wall 52 and by a right wall 54, both of which extend parallel to the y-z plane.
  • a first bipolar plate 24 and a second bipolar plate 36 are identical in construction and each have a zigzag-shaped cross-section in the z-x plane.
  • the zigzag cross-section defines fuel gas channels 28 and oxidation gas channels 26.
  • the first bipolar plate 24 and the second bipolar plate 36 are rotated 180 degrees from each other about the y-axis.
  • one of the upper extremities of the surface 42 of the first bipolar plate 24 extending in the y-direction and one of the lower extremities of the surface 44 of the second bipolar plate 36 extending in the y-direction face each other in order to engage with the MEA 30 to form a contact point 38 and a corresponding mating contact point 40.
  • the fuel cell stack 10 shown schematically in FIG. 7 illustrates a related embodiment.
  • the first bipolar plate 24 has a zigzag-shaped surface 42 and a zigzag-shaped lower surface 56.
  • the entirety of the upper surface 42 and the lower surface 56 is periodic in the x-direction 2, wherein their projection on the x-direction (that is, their maximum dimension in the x-direction 2) measures an odd multiple (here: five) of half the period length.
  • the period length here is identical to the distance in the x direction between adjacent extreme positions 60 of the lower surface 56, or, equivalently, with the distance in the x direction between adjacent extreme points 58 of the upper surface 42.
  • the first bipolar plate 24 and the second bipolar plate 36 are rotated 180 degrees against each other about the z-axis 6 parallel to the stacking direction.
  • one of the upper extremities of the surface 42 of the first bipolar plate 24 extending in the y direction and one of the lower extremities of the surface 44 of the second bipolar plate 36 extending in the y direction face each other in order to engage with the MEA 30 to form a contact point 38 and a corresponding mating contact point 40.
  • FIG. 8 illustrates another embodiment.
  • a fuel cell stack has a first bipolar plate 24 and a second bipolar plate 36, which are rotated relative to each other by 90 degrees about the z-axis parallel to the stacking direction (perpendicular to the image plane).
  • the two bipolar plates 24, 36 are shown side by side in the figure, but in fact they lie one above the other in the stacking direction.
  • the two bipolar plates 24 and 36 are designed substantially similar to the corresponding bipolar plates in Figure 6 or Figure 7, that is, they each have a zigzag-shaped cross-section. Their cross section could also be wavy or meandering.
  • the channels 26, 28 of the first bipolar plate 24 and the channels 26, 28 of the second bipolar plates are stacked one above the other and intersect each other at right angles.
  • the extreme locations of a surface of the first bipolar plate 24 extend in the y-direction 4, while the extreme locations of a surface of the second bipolar plate 36 extend in the x-direction 2. Together, they define a quadratic grid parallel to the x-y plane, with each grid point associated with a contact pad between the first bipolar plate 24 and a first surface of an MEA (not visible) and a corresponding mating pad between the second bipolar plate 36 and a second surface of the MEA.
  • FIG. 9 illustrates a method of manufacturing a fuel cell stack.
  • the method begins in step 900.
  • another bipolar plate is placed on the already existing part of the fuel cell stack to be produced.
  • a further MEA is placed on this bipolar plate (step 902).
  • a further bipolar plate identical in construction to the last one that is to say in step 901 is produced.
  • placed bipolar plate is rotated or pivoted in a rotated relative to the last applied bipolar plate position and then placed on the MEA.
  • the further bipolar plate is rotated such that a fuel cell stack according to one of the embodiments shown schematically in Figures 3, 4, 6, 7 and 8 is formed.
  • step 904 another MEA is placed on the stack, that is, on the rotated bipolar plate. It is conceivable that the further MEA is identical to the previous MEA, and that it is rotated relative to the previous MEA in the same way as the bipolar plate on which it is placed.
  • step 905 it is then determined whether further units should be placed on the stack. If so, the process flow returns to step 901, that is, at least two more bipolar plates and two more MEAs are placed on the stack. Otherwise, the process is ended (step 906).
  • a surface pressure force is applied which compresses the bipolar plates and MEAs. It is advantageous to adjust this force so that the highlighted areas or extreme points of the bipolar plates, ie those points of the bipolar plates which are in contact with the MEA at contact points or mating contact points, are deformed in a planar manner. This creates a largely planar contact.
  • surface pressure in the areas of the bipolar plates without counter contact yet no increased force effect. This can be achieved particularly well if nickel foam is used, which is relatively yielding.
  • the protruding points are thus compressed to allow a surface contact and a lower height. It is important to ensure that the areas are not exposed to the increased force without mating contact, to avoid that, for example, a nickel foam evenly distributed over the MEA area and a large area forms a mating contact instead of at selected locations.
  • MEA membrane electrode assembly

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Fuel Cell (AREA)

Abstract

L'invention concerne un empilement de piles à combustible (10) comprenant plusieurs dispositifs d'électrodes à membranes (MEA) et plusieurs plaques bipolaires, au moins une surface (42) d'une première plaque bipolaire (24) étant ondulée, en forme de méandres ou de zigzags, et les points extrêmes de la surface (42) de la plaque bipolaire (24) venant en contact, en des points de contact (38), avec une première surface (32) d'un MEA (30). L'invention est caractérisée en ce que des points de contact opposés (40) sur une seconde surface (34) du MEA opposée à la première surface (32) du MEA, sont associés au moins à une partie desdits points de contact (38), les points de contact opposés qui viennent en contact appartenant à une surface (44) d'une seconde plaque bipolaire (36), et en ce que les points de contact (38) et les points de contact opposés associés (40) étant superposés en direction (6) de l'empilement. L'invention concerne en outre un procédé de production d'un empilement de piles à combustible (10). L'invention concerne également une plaque bipolaire (24) pour un empilement de piles à combustible (10), comprenant une surface supérieure (42) ondulée, en forme de méandres ou de zigzags, une surface inférieure (56), une paroi gauche (52) et une paroi droite (54).
PCT/DE2009/001362 2008-10-23 2009-09-29 Empilement de piles à combustible Ceased WO2010045912A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2011531345A JP5372161B2 (ja) 2008-10-23 2009-09-29 燃料電池スタック
US13/062,884 US8790844B2 (en) 2008-10-23 2009-09-29 Fuel cell stack

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008052945.1 2008-10-23
DE102008052945.1A DE102008052945B4 (de) 2008-10-23 2008-10-23 Brennstoffzellenstapel und Verfahren zu dessen Herstellung

Publications (1)

Publication Number Publication Date
WO2010045912A1 true WO2010045912A1 (fr) 2010-04-29

Family

ID=41510623

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2009/001362 Ceased WO2010045912A1 (fr) 2008-10-23 2009-09-29 Empilement de piles à combustible

Country Status (4)

Country Link
US (1) US8790844B2 (fr)
JP (1) JP5372161B2 (fr)
DE (1) DE102008052945B4 (fr)
WO (1) WO2010045912A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107978772A (zh) * 2016-10-21 2018-05-01 通用汽车环球科技运作有限责任公司 用于均匀接触压力分布的隧道位置的优化

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014106491A1 (de) * 2014-05-08 2015-11-12 Elringklinger Ag Interkonnektorelement und Verfahren zur Herstellung eines Interkonnektorelements
DE102015220504A1 (de) * 2015-10-21 2017-04-27 Robert Bosch Gmbh Verfahren zur Oberflächenbearbeitung eines Metallschaums, Metallschaum und dessen Verwendung
US10547064B2 (en) * 2016-10-05 2020-01-28 GM Global Technology Operations LLC Tunnel cross section for more uniformed contact pressure distribution on metal bead seal at the intersection between bead and tunnel
CN109616684B (zh) * 2018-10-31 2021-12-17 华中科技大学 一种通过单套模具成型的质子交换膜燃料电池金属双极板
DK181478B1 (en) * 2022-07-01 2024-02-26 Green Hydrogen Systems As Method of assembly of a water electrolysis stack, bipolar plates adapted for use in an electrolyser stack and use of bipolar plates.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1098380A1 (fr) * 1998-06-18 2001-05-09 Toyota Jidosha Kabushiki Kaisha Separateur de gaz pour pile a combustible
US20050181264A1 (en) * 2004-02-17 2005-08-18 Wenbin Gu Capillary layer on flowfield for water management in PEM fuel cell
EP1686641A1 (fr) * 2003-11-11 2006-08-02 Nitta Corporation Separateur et methode de production pour separateur
US20070048585A1 (en) * 2005-08-29 2007-03-01 Toyota Jidosha Kabushiki Kaisha Fuel cell and frame used therein
US20080145740A1 (en) * 2005-03-18 2008-06-19 Franck Blein Bipolar Plate for Fuel Cell with Deformed Metal Distribution Sheet

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59710703D1 (de) * 1997-04-10 2003-10-09 Proton Motor Fuel Cell Gmbh Verfahren zum regeln der membranfeuchte einer polymerelektrolyt-brennstoffzelle und polymerelektrolyt-brennstoffzelle
JPH10308227A (ja) * 1997-05-07 1998-11-17 Fuji Electric Co Ltd 固体高分子電解質型燃料電池
US6663994B1 (en) * 2000-10-23 2003-12-16 General Motors Corporation Fuel cell with convoluted MEA
DE10058930A1 (de) * 2000-11-28 2002-06-20 Emitec Emissionstechnologie Kompakte Brennstoffzellenanordnung
DE10117572B4 (de) * 2001-04-07 2005-10-13 Ballard Power Systems Inc., Burnaby Elektrochemischer Zellenstapel
JP3599280B2 (ja) * 2002-05-17 2004-12-08 本田技研工業株式会社 燃料電池
JP4713071B2 (ja) * 2003-09-12 2011-06-29 トヨタ自動車株式会社 燃料電池とその製造方法
US6974648B2 (en) * 2003-09-12 2005-12-13 General Motors Corporation Nested bipolar plate for fuel cell and method
US7781122B2 (en) * 2004-01-09 2010-08-24 Gm Global Technology Operations, Inc. Bipolar plate with cross-linked channels
DE102005022894A1 (de) * 2005-05-18 2006-11-23 Staxera Gmbh SOFC-Stapel
JP2007280740A (ja) * 2006-04-06 2007-10-25 Hitachi Ltd 電解質，電解質膜、それを用いた膜電極接合体，燃料電池電源及び燃料電池電源システム

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1098380A1 (fr) * 1998-06-18 2001-05-09 Toyota Jidosha Kabushiki Kaisha Separateur de gaz pour pile a combustible
EP1686641A1 (fr) * 2003-11-11 2006-08-02 Nitta Corporation Separateur et methode de production pour separateur
US20050181264A1 (en) * 2004-02-17 2005-08-18 Wenbin Gu Capillary layer on flowfield for water management in PEM fuel cell
US20080145740A1 (en) * 2005-03-18 2008-06-19 Franck Blein Bipolar Plate for Fuel Cell with Deformed Metal Distribution Sheet
US20070048585A1 (en) * 2005-08-29 2007-03-01 Toyota Jidosha Kabushiki Kaisha Fuel cell and frame used therein

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107978772A (zh) * 2016-10-21 2018-05-01 通用汽车环球科技运作有限责任公司 用于均匀接触压力分布的隧道位置的优化
CN107978772B (zh) * 2016-10-21 2021-05-18 通用汽车环球科技运作有限责任公司 用于均匀接触压力分布的隧道位置的优化

Also Published As

Publication number Publication date
DE102008052945B4 (de) 2014-06-12
JP2012505525A (ja) 2012-03-01
JP5372161B2 (ja) 2013-12-18
US20110229788A1 (en) 2011-09-22
DE102008052945A1 (de) 2010-04-29
US8790844B2 (en) 2014-07-29

Similar Documents

Publication Publication Date Title
EP3140434B1 (fr) Couche de diffusion de gaz, cellule électrolytique pem équipée d'une telle couche de diffusion de gaz, ainsi qu'électrolyseur
DE112009001377B4 (de) Gasströmungsweg-Bildendes Element, Verfahren zum Herstellen des Gasströmungsweg-Bildenden Elements und Vorrichtung zur Ausbildung des Gasströmungsweg-Bildenden Elements
DE112009002060B4 (de) Brennstoffzelle
DE112009004658T5 (de) Gaskanal-ausbildungselement in brennstoffzelle, verfahren zu dessen herstellung, und umvformvorrichtung hierfür
DE112004001773T5 (de) Strömungsfeldplattenanordnung für eine Brennstoffzelle
DE102008052945B4 (de) Brennstoffzellenstapel und Verfahren zu dessen Herstellung
DE102019131088B4 (de) Kernmatrize für Presse zum Formen eines Metallseparators für eine Brennstoffzelle für Brennstoffzellenfahrzeug
WO2018108546A2 (fr) Procédé de fabrication d'une plaque bipolaire, plaque bipolaire pour pile à combustible et pile à combustible
DE102017124843A1 (de) Einzelzelle einer Brennstoffzelle
DE112005002126T5 (de) Ausrichtungsverfahren für sich wiederholende und nicht wiederholende Einheiten in einem Brennstoffzellenstapel
WO2018219591A1 (fr) Procédé de fabrication d'une pile à combustible et pile à combustible
WO2015120933A1 (fr) Plaque bipolaire, pile à combustible et véhicule automobile ainsi que procédé pour la fabrication de la plaque bipolaire
WO2022063970A1 (fr) Agencement de piles à combustible et procédé de fabrication d'un agencement de piles à combustible
DE102017203930B4 (de) Stapelvorrichtung zur Herstellung eines Brennstoffzellenstapels
EP3736894A1 (fr) Plaque bipolaire pour piles à combustible, empilement de piles à combustible doté de telles plaques bipolaires ainsi que véhicule doté d'un tel empilement de piles à combustible
DE19853458C2 (de) Polymerelektrolytmembran-Elektrolysezellenmodul und Polymerelektrolytmembran-Elektrolysevorrichtung mit einem solchen Modul
EP1435671A1 (fr) Configuration des canaux de fluide pour une pile à combustible
WO2021175553A1 (fr) Kit pour empilement de piles à combustible et procédé de fabrication d'empilement de piles à combustible
DE102021112699A1 (de) Brennstoffzellenstapel mit einem Kompressionssystem für den Brennstoffzellenstapel
EP4244923B1 (fr) Empilement de piles à combustible à structure de tissu compressible
EP4150137B1 (fr) Empilement de cellules, procédé de production d'un empilement de cellules, et pile à combustible ou cellule d'électrolyse comprenant un empilement de cellules
DE102019203321A1 (de) Brennstoffzellenplatte, Brennstoffzellenaufbau und Brennstoffzellensystem
WO2002071521A2 (fr) Plaque bipolaire
DE102020207918B4 (de) Brennstoffzellenanordnung und Verfahren zur Herstellung einer Brennstoffzellenanordnung
WO2002027834A2 (fr) Module a piles a combustible

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09744934

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2011531345

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 13062884

Country of ref document: US

122 Ep: pct application non-entry in european phase

Ref document number: 09744934

Country of ref document: EP

Kind code of ref document: A1